nesa

I'm trying to make simple video crop function in opengl, like in the patch 

The idea is to 'zoom' part of texture, and then scale and position 

videoplane so that 'zoomed' texture retains original size&position on 

It sort of works, but I'm a bit stuck with the problem when the video is 

rotated - it gets moved incorrectly*, probably because I should apply some 

trigonometry functions on offset x&y coordinates.

* when i move right crop point, and the video is rotated, it also moves 

up-down. I would like it to stay in place.

I'm trying to make simple video crop function in opengl, like in the patch 
below.
The idea is to 'zoom' part of texture, and then scale and position 
videoplane so that 'zoomed' texture retains original size&position on 
output.
It sort of works, but I'm a bit stuck with the problem when the video is 
rotated - it gets moved incorrectly*, probably because I should apply some 
trigonometry functions on offset x&y coordinates.

* when i move right crop point, and the video is rotated, it also moves 
up-down. I would like it to stay in place.

triggy-question

Have a look at the patch below. It will show you how to calculate

texture rotations. You can probably use the same method to perform

Hi Nesa,
Have a look at the patch below.  It will show you how to calculate
texture rotations.  You can probably use the same method to perform
croppings the way you're looking for.

this does exactly what i need, thanks for doing it for me!

any chance to fix bordercolor thing soon? when that is fixed, your patch 

any chance to fix bordercolor thing soon? when that is fixed, your patch 
will do all i need, fast and simple!

> any chance to fix bordercolor thing soon? when that is fixed, your patch

> any chance to fix bordercolor thing soon? when that is fixed, your patch
> will do all i need, fast and simple!

Ok, it's fixed for the next version of jitter.

Is it possible to fix my patch with this also? Im having problems with a zoomed image not rotating in the centre of the cat window as the anchor points and constantly changing... Im just trying to get slight vertcal rotation when the image moves vertically. Similar to a boat tilting from side to side in the water. The reasom I want this is because I have the image moving on a projection which is then being reflected off a motorised mirror. The mirror moves in the opposite direction to the image. The idea is for the projection to move along a wall while the image stays still (with only parts of the image being revealed at any one time.

Did you take a look at the patch I posted? It probably does

> Is it possible to fix my patch with this also? Im having problems with a zoomed image not rotating in the centre of the cat window as the anchor points and constantly changing... Im just trying to get slight vertcal rotation when the image moves vertically. Similar to a boat tilting from side to side in the water. The reasom I want this is because I have the image moving on a projection which is then being reflected off a motorised mirror. The mirror moves in the opposite direction to the image. The idea is for the projection to move along a wall while the image stays still (with only parts of the image being revealed at any one time.

> #P newex 731 364 66 196617 jit.rgb2luma;

> #P newex 652 171 93 196617 scale 0 240 0 540;

> #P newex 546 172 93 196617 scale 0 320 0 800;

> #P user jit.fpsgui 170 719 60 196617 0;

> #P flonum 138 194 35 9 0 0 0 3 0 0 0 221 221 221 222 222 222 0 0 0;

> #P newex 65 153 116 196617 scale 0 240 -0.24 0.24;

> #P comment 483 575 208 196617 ? get list of connected devices;

> #P comment 490 602 208 196617 ? update firmware , opens file open dialog;

> #P comment 472 629 197 196617 ? print usage info to the Max window;

> #P comment 490 739 251 196617 ? indicates whether a device is opened or not;

> #P comment 493 547 217 196617 ? set all DMX channels temporarily to zero;

> #P message 434 546 61 196617 blackout $1;

> #P comment 501 499 208 196617 ? get the parameters of the DMX USB Pro Interface (i.e. refresh rate , break time and mark after brake time);

> #P message 434 498 55 196617 getparams;

> #P number 673 801 35 9 0 0 0 3 0 0 0 221 221 221 222 222 222 0 0 0;

> #P comment 714 802 90 196617 ? DMX value;

Did you take a look at the patch I posted?  It probably does
everything you need.

hi i had a look but as im a nubi, I cant really decipher it. What object in particular should I focus on? where should I apply it in my patch?

triggy question